b = 'wo shi "ds" '  # "也可以用\“
c = 'adf \"sdf\"  '
print(b)
print(c)
print(len(b))

a = 'i\n love \n u'  # \n 换行
print(a)

a = 'a\tb\tc\taa'  # 制表符
print(a)
a = 'aqq\bb\bc\baa\b'
print(a)

a = 'acbcdefg'
b = a.replace('c', 'xx')
print(b)

d = '123456789'
print(d[::-1])  # 实现倒序功能 987654321
e = '我 是 中 国 人'
print(e.split())  # 默认用空格分割
f = 'a,b,c,d,e'
print(f.split(',')[3])
